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Product Description
Add striking architectural interest to your garden with Eryngium Planum Flower seeds, a premium heirloom variety prized for its metallic blue, thistle-like blooms. These non-GMO seeds are carefully selected for strong germination and healthy growth. Perfect for garden beds, borders, and as cut flowers, Eryngium Planum brings low-maintenance beauty and seasonal charm to home gardens.
Features & Benefits:
Heirloom Variety: Maintains traditional traits for consistent and attractive blooms.
Premium Quality Seeds: Selected for strong germination and robust growth.
Non-GMO: Pure, natural seeds suitable for home gardening.
Cut Flower Favorite: Produces unique, long-lasting blooms ideal for floral arrangements.
Versatile Planting: Ideal for garden beds, borders, and containers.
Specifications:
Seed Type: Flower
Variety: Eryngium Planum
Planting Season: Spring
Germination Time: 14–21 days
Mature Plant Height: 60–90 cm (approx.)
Light Requirements: Full sun
Soil Preference: Well-draining soil
Planting & Sowing Instructions:
Site Selection: Choose a sunny location with well-draining soil.
Sowing Seeds: Sow seeds lightly on the soil surface and cover with 0.3–0.5 cm of soil.
Watering: Keep soil lightly moist until seedlings emerge.
Thinning: Thin seedlings to 40–50 cm apart once established for healthy growth.
Care: Minimal care required; occasional watering supports vibrant, long-lasting blooms.

Life Cycle
Perennial Flowering Plant
Planting Season
Spring, Early Fall
Growth Habit
Upright Clumping Form
Flavor Profile
Ornamental Non Edible
Plant Characteristics
Spiky Blue Flowerheads
Use
Cut Flowers, Borders
Growing Conditions
Well Drained Soil
Harvest Advantages
Excellent Dried Flowers
Plant Resistance
Drought Deer Resistant
Eryngium planum
Seed Names
Eryngium Planum, Sea Holly
Seed Type
Heirloom Open Pollinated
Eryngium planum, commonly known as Blue Sea Holly, is a striking perennial admired for its metallic blue, spiky flowerheads and sturdy stems. Highly valued as a fresh and dried cut flower, it thrives in sunny locations with well-drained soil and adds bold texture to garden beds.
Light Requirement
Full Sunlight
Planting Depth
¼ Inch Deep
Sowing Method
Direct Sow, Trays
Plant Spacing
12–18 Inches Apart
Days to Maturity
14–18 Weeks
Soil Preparation
Cold Stratification Required
Hardiness Zones
4–9 USDA
Water Needs
Low Moderate Water
Planting Season
Spring, Early Fall
Seed Count
Recommended Coverage
100
Up to 350 sq ft
500
Up to 1,750 sq ft
1000
Up to 3,500 sq ft